/Engine/Source/Runtime/Core/Public/Serialization/StructuredArchiveSlots.h
Represents a map in the structured archive. A map is similar to a record, but keys can be read back out from an archive. (This is an important distinction for binary archives).
class FStructuredArchiveMap : public [UE::StructuredArchive::Private::FSlotBase](API\Runtime\Core\Serialization\FSlotBase)